BALL VALVES 　Q41 or Q341 Model Class 150#, 300#, 600# Floating type of ball valve
　Q41 or Q341 Model Class 900#, 1500# Floating type of ball valve
　Q41 or Q341 Model PN4.0, 6.0, IO.OMPa Floating type of ball valve
　Q641 Model Class 150#, 300# Pneumatic Floating type of ball valve
　Q641 Model PN1.6, 2.5MPa Pneumatic floating type of ball valve
　Q641 Model PN4.0, 6.4MPA Pneumatic floating type of ball valve
　Q41H or Q341 Model Calss 150#, 300# Floating type of ball valve with metal to metal seating surfaces
BALL VALVES 2 　Q47 or Q347 Model Class 150#, 300#, 400# Trunnion mounted ball valve
　Q47 or Q347 Model Class 600#, 900#, 1500# Trunnion mounted ball valve
　Q47 or Q347 Model PN1.6, 25, 4.0MPa Trunnion mounted ball valve
　Q47 or Q347 Model PN6.4, IO.OMPa Trunnion mounted ball vavle
　Q647 Model Class 150#, 300# Pneumatic trunnion mounted ball valve
　Q647 Model Class 400#, 600 Pneumatic trunnion mounted ball valve
　Q647 Model PN1.6, 2.5MPa Pneumatic trunnion mounted ball valve
　Q647 Model PN4.0, 6.4MPa Pneumatic trunnion mounted ball valve
　Q647 Model PNIO.OMPa Pneumatic trunnion mounted ball valve
　Q47H or Q347H Model Class 150#, 300 Trunnion mounted ball valve with metal to metal seating surfaces
Q941 type and Q947 type electric ball valve 　Basic control circuit diagram for DQW electric actuator
　QB4,QB5 electrical control elements drawing(tianjin Ertong)
　QB1,QB2 and QB3 electrical control elements drawing(Tianjin Ertong)
　Electric element table for DQW electric actuator
　QB series electrical control elements drawing(changzhou auxiliary machine)